Timeline: How events unfolded in London's latest attack

LONDON (AP) - Britain suffered its third major extremist attack in three months on Saturday night when three men using a van and knives killed seven people in a busy area of London. This is how the attack at London Bridge and nearby Borough Market, which also left dozens injured, unfolded:

9:58 p.m., Saturday, June 3: A van entered London Bridge crossing the River Thames from north to south. The van mounted the sidewalk on the bridge and struck pedestrians. It later crashed outside the Barrowboy & Banker pub near stairs leading down to Borough Market. Three men left the vehicle and headed into the market, where they began stabbing people in pubs and restaurants while patrons and workers took cover and tried to help the wounded.

10:07 p.m.: Ambulance services were called to respond to reports of a white van ploughing through pedestrians on London Bridge, arriving within six minutes.

Forensic police work within a cordoned off area after an attack in the London Bridge area of London, Sunday, June 4, 2017. Police specialists collected evidence in the heart of London after a series of attacks described as terrorism killed several people and injured more than 40 others. (AP Photo/Frank Augstein)

10:08 p.m.: Police were also summoned to the scene. Officers searching for the attackers went through bars and restaurants as staff and customers hid.

10:16 p.m.: Eight minutes after police were first called, three male suspects were shot dead by eight armed officers near the Wheatsheaf pub on Stoney Street. A member of the public is also wounded in the "unprecedented" police gunfire, but not critically injured.

12:25 a.m., Sunday, June 4: Police declare the attacks on the bridge and at the restaurants and pubs as terror attacks.

6 a.m.: London Ambulance Service reports that six people died at the scene, and at least 48 patients were taken to five hospitals overnight. More than 80 medics attended the scene.

9:30 a.m.: Police say the death toll from the attacks stands at seven victims.

1 p.m.: Police say counterterrorism officers raided addresses in Barking, east London, arresting 12 people in connection with the attack.

10:45 p.m.: The SITE intelligence Group, which monitors extremist activity , says the Islamic State militant group issued a statement on its Aamaq news agency claiming IS "fighters" were responsible for the London attack.

Armed police descend an escalator at the foot of the Shard outside London Bridge station, Sunday June 4, 2017, near the scene of Saturday night's terrorist incident on London Bridge and at Borough Market. Several people were killed in the terror attack at the heart of London and dozens injured. Prime Minister Theresa May convened an emergency security cabinet session Sunday to deal with the crisis. (Dominic Lipinski/PA via AP)

A forensic police officer carries cases as he works within a cordoned off area after an attack in the London Bridge area of London, Sunday, June 4, 2017. Police specialists collected evidence in the heart of London after a series of attacks described as terrorism killed several people and injured more than 40 others. (AP Photo/Frank Augstein)

Police patrol on the streets in the London Bridge area of London, Sunday, June 4, 2017. Police specialists collected evidence in the heart of London after a series of attacks described as terrorism killed several people and injured more than 40 others. (AP Photo/Frank Augstein)